<?php

class SubPages{

  private  $each_disNums;//每页显示的条目数
  private  $nums;//总条目数
  private  $current_page;//当前被选中的页
  private  $sub_pages;//每次显示的页数
  private  $pageNums;//总页数
  private  $page_array = array();//用来构造分页的数组
  private  $subPage_link;//每个分页的链接
  private  $subPage_type;//显示分页的类型

  function __construct($each_disNums,$nums,$current_page,$sub_pages,$subPage_link,$subPage_type){

    $this->each_disNums=intval($each_disNums);
    $this->nums=intval($nums);
    if(!$current_page){
      $this->current_page=1;
    }else{
      $this->current_page=intval($current_page);
    }
    
    $this->sub_pages=intval($sub_pages);
    $this->pageNums=ceil($nums/$each_disNums);
    $this->subPage_link=$subPage_link;
    $this->show_SubPages($subPage_type);

  }

  function __destruct(){

    unset($each_disNums);
    unset($nums);
    unset($current_page);
    unset($sub_pages);
    unset($pageNums);
    unset($page_array);
    unset($subPage_link);
    unset($subPage_type);

  }


  function show_SubPages($subPage_type){

    if($subPage_type == 1){
      $this->subPageCss1();
    }elseif ($subPage_type == 2){
      $this->subPageCss2();
    }

  }

  function initArray(){

    for($i=0;$i<$this->sub_pages;$i++){
      $this->page_array[$i]=$i;
    }
    
    return $this->page_array;

   }


  function construct_num_Page(){

    if($this->pageNums < $this->sub_pages){

      $current_array=array();
  
      for($i=0;$i<$this->pageNums;$i++){
        $current_array[$i]=$i+1;
      }

    }else{

      $current_array=$this->initArray();
      if($this->current_page <= 3){

        for($i=0;$i<count($current_array);$i++){
          $current_array[$i]=$i+1;
        }

      }elseif ($this->current_page <= $this->pageNums && $this->current_page > $this->pageNums - $this->sub_pages + 1 ){

        for($i=0;$i<count($current_array);$i++){
          $current_array[$i]=($this->pageNums)-($this->sub_pages)+1+$i;
        }

      }else{

        for($i=0;$i<count($current_array);$i++){
          $current_array[$i]=$this->current_page-2+$i;
        }
     }
    }

    return $current_array;

   }



/*
   构造普通模式的分页
   共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [下页] [尾页]
 */

  function subPageCss1(){

    $subPageCss1Str="";
    $subPageCss1Str.="<span class=disabled>当前".$this->current_page."/".$this->pageNums."页</span>";
    $subPageCss1Str.="<span class=disabled>".$this->each_disNums."/".$this->nums."</span>";
    
    if($this->current_page > 1){
    
      $firstPageUrl=$this->subPage_link."1";
      $prewPageUrl=$this->subPage_link.($this->current_page-1);
      $subPageCss1Str.="<a href='$firstPageUrl'>首页</a>";
      $subPageCss1Str.="<a href='$prewPageUrl'>上一页</a>";
    
    }else {
    
      $subPageCss1Str.="<span class=disabled>首页</span>";
      $subPageCss1Str.="<span class=disabled>上一页</span>";
    
    }
    
    if($this->current_page < $this->pageNums){
    
      $lastPageUrl=$this->subPage_link.$this->pageNums;
      $nextPageUrl=$this->subPage_link.($this->current_page+1);
      $subPageCss1Str.="<a href='$nextPageUrl'>下一页</a>";
      $subPageCss1Str.="<a href='$lastPageUrl'>尾页</a>";
    
    }else {
    
      $subPageCss1Str.="<span class=disabled>下一页</span>";
      $subPageCss1Str.="<span class=disabled>尾页</span>";
    
    }
    
    return $subPageCss1Str;

   }





/*
   构造经典模式的分页
   当前第1/453页 [首页] [上页] 1 2 3 4 5 6 7 8 9 10 [下页] [尾页]
 */

  function subPageCss2(){

    $subPageCss2Str="";
    
    if($this->current_page > 1){
      
      $firstPageUrl=$this->subPage_link."1";
      $prewPageUrl=$this->subPage_link.($this->current_page-1);
      $subPageCss2Str.="<li><a href='$firstPageUrl'>首页</a></li>";
      $subPageCss2Str.="<li><a href='$prewPageUrl'>&laquo;</a></li>";
    
    }else {
    
      $subPageCss2Str.="<li class='disabled'><span>首页</span></li>";
      $subPageCss2Str.="<li class='disabled'><span>&laquo;</span></li>";
    
    }
    
    $a=$this->construct_num_Page();
    for($i=0;$i<count($a);$i++){
      $s=$a[$i];
      if($s == $this->current_page ){
        
        $subPageCss2Str.="<li class='active'><a href='#'>".$s."</a></li>";
        
      }else{
    
       $url=$this->subPage_link.$s;
       $subPageCss2Str.="<li><a href='$url'>".$s."</a></li>";
    
      }
    }
    
    if($this->current_page < $this->pageNums){

      $lastPageUrl=$this->subPage_link.$this->pageNums;
      $nextPageUrl=$this->subPage_link.($this->current_page+1);
      $subPageCss2Str.="<li><a href='$nextPageUrl'>&raquo;</a></li>";
      $subPageCss2Str.="<li><a href='$lastPageUrl'>尾页</a></li>";
    
    }else {
    
      $subPageCss2Str.="<li class='disabled'><span>&raquo;</span></li>";
      $subPageCss2Str.="<li class='disabled'><span>尾页</span></li>";
    
    }
    
    $subPageCss2Str.="&nbsp;&nbsp;<li class='disabled'><span>当前".$this->current_page."/".$this->pageNums."页</span></li>";
    
    return $subPageCss2Str;

   }

}
?>
